Talassia is a mermaid from Andros. She lives in the Underwater Kingdom of Andros. Talassia mainly appears in Winx Club season 3. She is a Mermaid of Shells. She is also good friends with Coralia and Corelia.
Talassia is captured by Valtor's evil spell, along with Coralia and Corelia. Valtor places his mark on them; stealing their magic and changing them into mer-monsters that attacked anything that crossed their paths. After Valtor's defeat, Talassia's magic returned, she became a normal mermaid again and she returns home to the Underwater Kingdom.
A mermaid similar to Talassia appears again in "The Enchanted Island," as the Guardian of Tir Nan Og took the form of three mermaids from Andros: her alongside Coralia-look-alike. They turn out to be fake mermaids conjured up by the magic. They lured Aisha out into the water and pushed her underwater after she introduced herself. While the real Talassia and the mermaids are at home in the Underwater Kingdom of Andros.
Talassia has very long blond hair and brown eyes, made up of sky blue. Some strands of her hair are adorned with orange pearls. Her bra is very long and looks more like a tunic, sky blue, marked by cutouts on the side and a shell in spiral gilded as a brooch. She has pink ruffles on her arms and a long sky-blue mermaid tail adorned with pink ruffles.
Talassia is a very gentle and sweet mermaid. She is very innocent and shy.
- "Talassia" is a genus of very small sea snails.